Skip to content
I struggle with chemistry, especially formulas because i can't do maths either...so if you answer my questions please could you do it very clearly and if possibly simply?
For example, you could have two masses or percentages like 27.3% carbon and 72.7% oxygen.
You first divide each mass by its relative atomic mass so carbon's is 12 and oxygen's is 16.
27.3/12 = 2.275 72.7/16 = 4.55
You then divide them all by the smallest:
2.275/2.275 = 1 4.55/2.275 = 2
So therefore, you need 1:2 C:O ratio which is CO2
This may explain it easier:
thank you so much! that does help actually and i'll have a look at the site :)
No problem! Just remember the steps:
1) divide the masses by their relative atomic masses
2) divide these results by the smallest result
3) put the numbers into a ratio and it gives how many of each element you need